
doc:   [
    DocGroup({"tag": "bullet"}, [
        DocGroup({"tag": "h3"}, [
            DocGroup({"tag": "caret", "client": "b"}, []),
            DocChars("V"), DocGroup({"tag": "caret", "client": "a"}, []),
            DocChars("  ")
        ]),
        DocGroup({"tag": "h3"}, [
            DocChars("6")
        ]),
        DocGroup({"tag": "h3"}, [
            DocChars("778f6ello wo1What\'s up with you?")
        ])
    ])
]

a_del: [
    DelGroup([
        DelGroup([
            DelWithGroup([]),
            DelSkip(1), DelGroup([]),
            DelChars(2)
        ]),
        DelSkip(2)
    ])
]
a_add: [
    AddGroup({"tag": "h3"}, [
        AddWithGroup([]),
        AddSkip(1), AddChars("W"), AddGroup({"client": "a", "tag": "caret"}, [])
    ])
]

b_del: [
    DelGroup([
        DelGroup([
            DelGroup([]),
            DelSkip(1), DelWithGroup([]),
            DelSkip(1), DelChars(1)
        ]),
        DelGroup([
            DelChars(1)
        ]),
        DelGroup([
            DelChars(1), DelSkip(31)
        ])
    ])
]
b_add: [
    AddGroup({"tag": "h3"}, [
        AddSkip(1), AddWithGroup([]),
        AddSkip(1), AddChars("y"), AddGroup({"client": "b", "tag": "caret"}, []),
        AddSkip(31)
    ])
]
